package filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "dgutFilter", urlPatterns ={ "/Login","/login/dgut"})
public class dgutFilter implements Filter {
    @Override
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        if(request.getParameter("token")==null)
            response.sendRedirect("https://cas.dgut.edu.cn?appid=javaee");
        else
            chain.doFilter(req,resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
